I am told that Dynamic adds less to the used value than Pan Roof, Tech pack and B&O. Maybe it's different in different parts of the country. My ols S3 (similar spec) booked at £22K and sold at £32K in 2015 when 18 months old. It's all opinion!
Indeed it is......
Your issue is that you are asking retail money for yours and you’ll struggle to get someone to come along with 37k as a cash buyer.
Most buyers at this level will want to finance some or all of the car.
I had Standard sports seats (all electric mind) on the Mythos RS and I agree they were comfy, however the SSS I have now are better looking and just as comfy.